Apparatus for lighting dwellings and other structures



(No Modell) W. WHEELER.

APPARATUS TOR LIGHTING DWBLLINGS 'AND OTHER STRUCTURES.l No. 247,231.

Patented Sept. 20

.W r .www V mWmu W r "il UNITED STATES PATENT OFFICE.

TVILLIAM WHEELER, OF CONUORD,.MASSACHUSETTS.

APPARATUS FOR LIGHTING DWELLlNGS AND OTHER STRUCTURES.v

SPECIFICATION forming part of Letters Patent No. 247,231, dated September 20, 1881,

Application filed April 2, 188i.

To all whom it may concern:

Be it known that I, WILLIAM WHEELER, of Concord, of the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Apparatus for Lighting Dwellings and other Structures; and I do hereby declare the following to be a full and exact description of the invention, reference being had to the accompanying drawings, which form part of this specification.

This invent-ion is designed to be an improvement upon and supplementary to my invention of certain new and useful improvements in apparatus and means'i'or lighting dwellings, upon which an application for a United States patent was tiled by me on the 10th day of December, 1880.

Figures l to 4, inclusive, represent various forms of my invention, which may be called tapering light-dispersas7 to be used with tubes for transmittinglightfrom asource' thereof. Fig. 5 is a vertical section of the disperser shown in Fig. l.

The said dispersers consisteach of a simple tubular or hollow piece of glass, A, tapering gradually from its base or open end (by and at which it is connected with a light-transmitting tube, B) to a point or edge, as shown, and ground upon the inside; or it may be transversely corrugated, or be both ground and corrugated. The inner surface of the tapering or converging part of the said disperser, by virtue of such convergence toward the center of the pencil of light received into the same through said light-transmitting tube B, receives the rays of such light directly upon itself throughout the whole length of the taper- (No model.)

ing part. Were the said inner surface smooth and polished, even though the outside were ground, most of the light falling on such inner surface would be reflected to the end or point of the disperser, and the dispersion would be very unequal. With theconstruction described, however, the said ground or corrugated surface largely prevents such reliection, by causing an immediate diffusion and dispersion of the light in all directions, thus avoiding the necessity of a separate reflecting, refracting,

or dispel-sing body or surface within the said tube.

Fig. 1 shows a simple form tapering' alike on all sides nearly to a point.

Fig. 2 denotes a candle-shaped forni of the light-disperser.

Figs. 3 and 4 show a iiat or wedge-shaped form of light-dispersers, in which the light is received chietly on the two opposite ilattened faces of the disperser, Fig. 3 exhibiting a face or side view and Fig. 4 an end view of the same.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A light-disperser, substantially as described constructed of glass, of a tapering or wedgeshaped form, hollow, and ground or corrugated on the inside, it being combined or for use with a light-transmitting tube, essentially as set forth.

WM. VHEELER. Witnesses:

R. H. EDDY, E. B. PRATT. 

